Barricade 4+

Lance Henderson

Designed for iPhone

    • 4.3 • 3 Ratings
    • Free

iPhone Screenshots


This is a utility for Industrial Radiographers using Iridium or Cobalt sources.

Ever get tired of using a clumsy slide rule to make radiation calculations? Or, even worse, doing them by hand with a pencil and paper!

This app will help you verify calculations.

This app is very simple to operate. You simply enter the curies, choose the source, and the shot time in minutes (if less than 60). Hit the Calculate button and you are done.

The app makes four separate calculations for you. I will explain these below;

1) It calculates the the distance to the Barricade (dose of 2 mrem) without any shielding factored in.

2) It calculates the distance to the barricade with a common 4 half-value layer collimator included.

3) It calculates the distance to the barricade in an emergency or worse case conditions (eg. source malfunction).

4) It tells you what the maximum allowable reading on the barricade is. This is used when shooting for much less than and hour and the barricade is small enough that more than 2 mR/hr is observed.

What’s New

Version 2.3

This app has been updated by Apple to display the Apple Watch app icon.

Updated the Max Dose Rate to 0.1 digit precision.

Ratings and Reviews

4.3 out of 5
3 Ratings

3 Ratings

Kilor ,


Great app but can be better if you can adjust HVL

Ldbradiogapher ,


Great app. I use a 5 HVL though!

Rockinrayholt ,

Barricade Rocks !!!!

Simple and easy to use. A MUST HAVE for radiographers ...

App Privacy

The developer, Lance Henderson, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

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